Subsoil attachment for plows



L. L. JOHNSON.

SUBSOIL ATTACHMENT FOR FLOWS.

APPLICATION FILED JUNE 11, 1919.

1 $360,409. Patented Nov. 30, 1920.

UNITED STATES LEONARD I4. JOHNSON, F KEYS VILLE, VIRGINIA.

SUBSOIL ATTACHMENT FOR PLOWS.

. Specification of Letters Patent.

Patented Nov. 30, 1920.

Application filed June 11, 1919. Serial No. 303,269.

- To all whom it may concern:

Be it known that I, LEONARD L. JOHNSON, a citizen of the United States,residin at Keysville, in the county of Charlotte, tate of Virginia, haveinvented certain new and useful Im orovements in subsoil Attachments forlows; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in plows andparticularly to subsoil attachments therefor.

One object of the present invention is toprovide a novel and improveddevice for attachment to the beam of a plow whereby subsoil plowing canbe accomplished.

Another object is to provide a novel and improved structure ofthischaracter which can be readily attached to the beam of ordinary plowwithout modifications to the plow beam, thus rendering the ordinary plowbeam usable for the act of subsoil plowing.

Other objects and advantages will be ap-.

parent from the following description when taken in connection with theaccompanying drawing.

In the drawing:

Figure 1 is a side elevation of a plow beam having my invention appliedthereto.

Fig. 2 is a side elevation viewed from the opposite side from that ofFig. 1.

Fig. 3 is a top plan view of the beam and attachment, showing the mannerin which the subsoil plow shovel is adjustable.

Referring particularly to the accompanying drawing, 10 represents ametal plow beam, in connection with which my invention is to be used,said beam being curved downwardly at its rear end to form the foot orstandard 11. In using my invention, with the plow beam, it will beunderstood that the share and moldboard are not removed from thestandard, thus permitting surface plowing as well as subsoil plowing.

The attachment includes a longitudinally curved stem 12 which fits onthe rear curved portion of the beam and is secured in proper positionthereon by the clips 13. The stem extends rearwardly and is thickenedand bifurcated vertically, as at 15, to receive the forward reduced endof the subsoil standard or digging member 26. This member has at itsrear end a foot 16 which curves downwardly and forwardly for engagementin the soil, as will be readily understood. A pivot bolt or pin 17 isdisposed through the arms1 1 of the bifurcation 15 and the end of themember 26, whereby the latter is capable of vertical swinging movement.A

plate 19 is disposed horizontally at one side of the thickened portionand pivoted to one fork-arinl l at 18. Along the opposite side stands asecond plate 19 constituting one arm of a right-angular lever whoseother arm 20 rises to a handle, and the angle of the lever is pivoted tosaid portion at 18 opposite the first pivot 18. The rear ends of thearms 19 and 19' are formed with slots 21 which receive a rear bolt 28,to permit a lost motion as the member 16 swings on the pin 17 which pinis disposed rearwardly of the forward pivots. Secured on the enlargement15 is a toothed segment 22 which is engaged by the hand actuated pawl ordetent 23, carried by the lever 20. Thus, when the lever is rocked onits pivot the rear end of the arm 19 will cause the member 26 to swingupwardly or down wardly, according to whether the foot 16 is to dig intothe soil to a greater or lesser depth. By means of the lever and itspawl, in conjunction with the toothed plate or segment 22, the plowmember can be set into the desired position and firmly held in suchposition.

Particular attention is called to the fact that the device can be easilyand quickly attached to a plow beam, without modification to the beam,at a point behind and below the share, moldboard and other parts of theregular plow, whereby surface and subsoil plowing can be accomplished atone and the same time.

What is claimed is:

A subsoil attachment for a plow beam including a stem longitudinallycurved to fit the rear curvature of the plow beam, an enlargement on therear end of the stem, a

digging member pivotally connected to the enlargement, a plate movablycarried by the v-iilurgeinent and loosely and operatively engaged withthe digging member, and an angle lever mounted on the other side of theenlargement and loosely and opemtively connected with the digging memberand (:0- operating with the plate to raise and lower the diggingme'znloer.

In testimony wliei'eefl I alfix my signanre, in the presen e of twowltnesses.

LEQNARD L. flilHNSON.

Htnesses L. J. YEAMAN, D. A. NcLsON.

